;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;; ;; ;; Copyright (C) KolibriOS team 2004-2022. All rights reserved. ;; ;; Distributed under terms of the GNU General Public License. ;; ;; ;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; $Revision$ DRV_COMPAT = 5 ;minimal required drivers version DRV_CURRENT = 6 ;current drivers model version DRV_VERSION = (DRV_COMPAT shl 16) or DRV_CURRENT PID_KERNEL = 1 ;os_idle thread align 4 proc get_notify stdcall, p_ev:dword .wait: mov ebx, [current_slot] test dword [ebx + APPDATA.event_mask], EVENT_NOTIFY jz @f and dword [ebx + APPDATA.event_mask], not EVENT_NOTIFY mov edi, [p_ev] mov dword [edi], EV_INTR mov eax, [ebx + APPDATA.event] mov dword [edi+4], eax ret @@: call change_task jmp .wait endp handle equ IOCTL.handle io_code equ IOCTL.io_code input equ IOCTL.input inp_size equ IOCTL.inp_size output equ IOCTL.output out_size equ IOCTL.out_size align 4 proc srv_handler stdcall, ioctl:dword mov esi, [ioctl] test esi, esi jz .err mov edi, [esi + handle] cmp [edi + SRV.magic], ' SRV' jne .fail cmp [edi + SRV.size], sizeof.SRV jne .fail ; stdcall [edi+SRV.srv_proc], esi mov eax, [edi + SRV.srv_proc] test eax, eax jz .fail stdcall eax, esi ret .fail: xor eax, eax not eax mov [esi + output], eax mov [esi + out_size], 4 ret .err: xor eax, eax not eax ret endp ; param ; ecx= io_control ; ; retval ; eax= error code align 4 srv_handlerEx: cmp ecx, OS_BASE jae .fail mov eax, [ecx + handle] cmp eax, OS_BASE jbe .fail cmp [eax + SRV.magic], ' SRV' jne .fail cmp [eax + SRV.size], sizeof.SRV jne .fail ; stdcall [eax+SRV.srv_proc], ecx mov eax, [eax + SRV.srv_proc] test eax, eax jz .fail stdcall eax, ecx ret .fail: or eax, -1 ret restore handle restore io_code restore input restore inp_size restore output restore out_size align 4 proc get_service stdcall, sz_name:dword mov eax, [sz_name] test eax, eax jnz @F ret @@: mov edx, [srv.fd] @@: cmp edx, srv.fd - SRV.fd je .not_load stdcall strncmp, edx, [sz_name], 16 test eax, eax mov eax, edx je .nothing mov edx, [edx + SRV.fd] jmp @B .not_load: mov eax, [sz_name] push edi sub esp, 36 mov edi, esp mov dword [edi], '/sys' mov dword [edi+4], '/dri' mov dword [edi+8], 'vers' mov byte [edi+12], '/' @@: mov dl, [eax] mov [edi+13], dl inc eax inc edi test dl, dl jnz @b mov dword [edi+12], '.sys' mov byte [edi+16], 0 mov edi, esp stdcall load_pe_driver, edi, 0 add esp, 36 pop edi .nothing: ret endp reg_service: xor eax, eax mov ecx, [esp+8] ;jecxz .nothing push sizeof.SRV push ecx pushd [esp+12] call reg_service_ex .nothing: ret 8 reg_usb_driver: push sizeof.USBSRV pushd [esp+12] pushd [esp+12] call reg_service_ex test eax, eax jz .nothing mov ecx, [esp+12] mov [eax+USBSRV.usb_func], ecx .nothing: ret 12 proc reg_service_ex stdcall, name:dword, handler:dword, srvsize:dword push ebx xor eax, eax cmp [name], eax je .fail ; cmp [handler], eax ; je .fail mov eax, [srvsize] call malloc test eax, eax jz .fail push esi push edi mov edi, eax mov esi, [name] movsd movsd movsd movsd pop edi pop esi mov [eax + SRV.magic], ' SRV' mov [eax + SRV.size], sizeof.SRV mov ebx, srv.fd - SRV.fd mov edx, [ebx + SRV.fd] mov [eax + SRV.fd], edx mov [eax + SRV.bk], ebx mov [ebx + SRV.fd], eax mov [edx + SRV.bk], eax mov ecx, [handler] mov [eax + SRV.srv_proc], ecx ;dec [count_services] pop ebx ret .fail: xor eax, eax pop ebx ret endp align 4 stop_all_services: ;used in shutdown system push ebp mov edx, [srv.fd] .next: cmp edx, srv.fd - SRV.fd je .done cmp [edx + SRV.magic], ' SRV' jne .next cmp [edx + SRV.size], sizeof.SRV jne .next mov ebx, [edx + SRV.entry] mov edx, [edx + SRV.fd] test ebx, ebx jz .next push edx mov ebp, esp push 0 push DRV_EXIT call ebx ;stdcall mov esp, ebp pop edx jmp .next .done: pop ebp ret align 4 proc get_proc stdcall, exp:dword, sz_name:dword mov edx, [exp] .next: mov eax, [edx] test eax, eax jz .end push edx stdcall strncmp, eax, [sz_name], 16 pop edx test eax, eax jz .ok add edx, 8 jmp .next .ok: mov eax, [edx+4] .end: ret endp align 4 proc get_coff_sym stdcall, pSym:dword,count:dword, sz_sym:dword @@: stdcall strncmp, [pSym], [sz_sym], sizeof.COFF_SYM.Name test eax, eax jz .ok add [pSym], sizeof.COFF_SYM dec [count] jnz @b xor eax, eax ret .ok: mov eax, [pSym] mov eax, [eax+COFF_SYM.Value] ret endp align 4 proc get_fileinfo stdcall, file_name:dword, info:dword locals cmd dd ? offset dd ? dd ? count dd ? buff dd ? db ? name dd ? endl xor eax, eax mov ebx, [file_name] mov ecx, [info] mov [cmd], 5 mov [offset], eax mov [offset+4], eax mov [count], eax mov [buff], ecx mov byte [buff+4], al mov [name], ebx mov eax, 70 lea ebx, [cmd] pushad cld call protect_from_terminate call file_system_lfn call unprotect_from_terminate popad ret endp align 4 proc read_file stdcall,file_name:dword, buffer:dword, off:dword,\ bytes:dword locals cmd dd ? offset dd ? dd ? count dd ? buff dd ? db ? name dd ? endl xor eax, eax mov ebx, [file_name] mov ecx, [off] mov edx, [bytes] mov esi, [buffer] mov [cmd], eax mov [offset], ecx mov [offset+4], eax mov [count], edx mov [buff], esi mov byte [buff+4], al mov [name], ebx pushad lea ebx, [cmd] call file_system_lfn_protected popad ret endp align 4 ; @brief Allocate kernel memory and loads the specified file ; ; @param file_name Path to file ; ; @returns File image in kernel memory in `eax` and size of file in `ebx` ; ; @warning You must call kernel_free() to delete each file loaded by the ; load_file() function proc load_file stdcall, file_name:dword locals attr dd ? flags dd ? cr_time dd ? cr_date dd ? acc_time dd ? acc_date dd ? mod_time dd ? mod_date dd ? file_size dd ? file dd ? file2 dd ? endl push esi push edi lea eax, [attr] stdcall get_fileinfo, [file_name], eax test eax, eax jnz .fail mov eax, [file_size] cmp eax, 1024*1024*16 ja .fail stdcall kernel_alloc, [file_size] mov [file], eax test eax, eax jz .fail stdcall read_file, [file_name], eax, dword 0, [file_size] cmp ebx, [file_size] jne .cleanup mov eax, [file] cmp dword [eax], 'KPCK' jne .exit mov ebx, [eax+4] mov [file_size], ebx stdcall kernel_alloc, ebx test eax, eax jz .cleanup mov [file2], eax pushad mov ecx, unpack_mutex call mutex_lock popad stdcall unpack, [file], eax pushad mov ecx, unpack_mutex call mutex_unlock popad stdcall kernel_free, [file] mov eax, [file2] mov ebx, [file_size] .exit: push eax lea edi, [eax+ebx] ;cleanup remain space mov ecx, 4096 ;from file end and ebx, 4095 jz @f sub ecx, ebx xor eax, eax cld rep stosb @@: mov ebx, [file_size] pop eax pop edi pop esi ret .cleanup: stdcall kernel_free, [file] .fail: xor eax, eax xor ebx, ebx pop edi pop esi ret endp ; description ; allocate user memory and loads the specified file ; ; param ; file_name= path to file ; ; retval ; eax= file image in user memory ; ebx= size of file ; ; warging ; You mast call kernel_free() to delete each file ; loaded by the load_file() function align 4 proc load_file_umode stdcall, file_name:dword locals attr dd ? flags dd ? cr_time dd ? cr_date dd ? acc_time dd ? acc_date dd ? mod_time dd ? mod_date dd ? file_size dd ? km_file dd ? um_file dd ? endl push esi push edi push ebx lea eax, [attr] stdcall get_fileinfo, [file_name], eax ;find file and get info test eax, eax jnz .err_1 mov eax, [file_size] cmp eax, 1024*1024*16 ;to be enough for anybody (c) ja .err_1 ;it is very likely that the file is packed stdcall kernel_alloc, [file_size] ;with kpack, so allocate memory from kernel heap mov [km_file], eax test eax, eax jz .err_1 stdcall read_file, [file_name], eax, dword 0, [file_size] cmp ebx, [file_size] jne .err_2 mov eax, [km_file] cmp dword [eax], 'KPCK' ; check kpack signature jne .raw_file mov ebx, [eax+4] ;get real size of file mov [file_size], ebx stdcall user_alloc, ebx ;and allocate space from user heap mov [um_file], eax test eax, eax jz .err_2 mov edx, [file_size] ;preallocate page memory shr eax, 10 lea edi, [page_tabs + eax] add edx, 4095 shr edx, 12 @@: call alloc_page test eax, eax jz .err_3 or eax, PG_UWR stosd dec edx jnz @B pushad mov ecx, unpack_mutex call mutex_lock stdcall unpack, [km_file], [um_file] mov ecx, unpack_mutex call mutex_unlock popad stdcall kernel_free, [km_file] ;we don't need packed file anymore .exit: mov edi, [um_file] mov esi, [um_file] mov eax, [file_size] mov edx, eax add edi, eax ;cleanup remain space mov ecx, 4096 ;from file end and eax, 4095 jz @f sub ecx, eax xor eax, eax cld rep stosb @@: mov eax, [um_file] pop ebx pop edi pop esi ret .raw_file: ; sometimes we load unpacked file stdcall user_alloc, ebx ; allocate space from user heap mov [um_file], eax test eax, eax jz .err_2 shr eax, 10 ; and remap pages. mov ecx, [file_size] add ecx, 4095 shr ecx, 12 mov esi, [km_file] shr esi, 10 add esi, page_tabs lea edi, [page_tabs+eax] cld @@: lodsd and eax, 0xFFFFF000 or eax, PG_UWR stosd loop @B stdcall free_kernel_space, [km_file] ; release allocated kernel space jmp .exit ; physical pages still in use .err_3: stdcall user_free, [um_file] .err_2: stdcall kernel_free, [km_file] .err_1: xor eax, eax xor edx, edx pop ebx pop edi pop esi ret endp uglobal align 4 unpack_mutex MUTEX endg align 4 proc get_proc_ex stdcall uses ebx esi, proc_name:dword, imports:dword mov ebx, [imports] test ebx, ebx jz .end xor esi, esi .look_up: mov eax, [ebx+32] mov eax, [OS_BASE + eax + esi*4] add eax, OS_BASE stdcall strncmp, eax, [proc_name], 256 test eax, eax jz .ok inc esi cmp esi, [ebx+24] jb .look_up .end: xor eax, eax ret .ok: mov eax, [ebx+28] mov eax, [OS_BASE + eax + esi*4] add eax, OS_BASE ret endp align 4 proc fix_coff_symbols stdcall uses ebx esi, sec:dword, symbols:dword,\ sym_count:dword, strings:dword, imports:dword locals retval dd ? endl mov edi, [symbols] mov [retval], 1 .fix: movzx ebx, [edi + COFF_SYM.SectionNumber] test ebx, ebx jnz .internal mov eax, dword [edi + COFF_SYM.Name] test eax, eax jnz @F mov edi, [edi+4] add edi, [strings] @@: push edi stdcall get_proc_ex, edi, [imports] pop edi xor ebx, ebx test eax, eax jnz @F ; disable debug msg ;mov esi, msg_unresolved ;call sys_msg_board_str ;mov esi, edi ;call sys_msg_board_str ;mov esi, msg_CR ;call sys_msg_board_str mov [retval], 0 @@: mov edi, [symbols] mov [edi + COFF_SYM.Value], eax jmp .next .internal: cmp bx, -1 je .next cmp bx, -2 je .next dec ebx shl ebx, 3 lea ebx, [ebx + ebx*4] add ebx, [sec] mov eax, [ebx + COFF_SECTION.VirtualAddress] add [edi + COFF_SYM.Value], eax .next: add edi, sizeof.COFF_SYM mov [symbols], edi dec [sym_count] jnz .fix mov eax, [retval] ret endp align 4 proc fix_coff_relocs stdcall uses ebx esi, coff:dword, sym:dword, \ delta:dword locals n_sec dd ? endl mov eax, [coff] movzx ebx, [eax + COFF_HEADER.nSections] mov [n_sec], ebx lea esi, [eax+20] .fix_sec: mov edi, [esi + COFF_SECTION.PtrReloc] add edi, [coff] movzx ecx, [esi + COFF_SECTION.NumReloc] test ecx, ecx jz .next .reloc_loop: mov ebx, [edi + COFF_RELOC.SymIndex] add ebx, ebx lea ebx, [ebx+ebx*8] add ebx, [sym] mov edx, [ebx + COFF_SYM.Value] cmp [edi + COFF_RELOC.Type], 6 je .dir_32 cmp [edi + COFF_RELOC.Type], 20 jne .next_reloc .rel_32: mov eax, [edi + COFF_RELOC.VirtualAddress] add eax, [esi + COFF_SECTION.VirtualAddress] sub edx, eax sub edx, 4 jmp .fix .dir_32: mov eax, [edi + COFF_RELOC.VirtualAddress] add eax, [esi + COFF_SECTION.VirtualAddress] .fix: add eax, [delta] add [eax], edx .next_reloc: add edi, 10 dec ecx jnz .reloc_loop .next: add esi, sizeof.COFF_SECTION dec [n_sec] jnz .fix_sec .exit: ret endp align 4 proc rebase_coff stdcall uses ebx esi, coff:dword, sym:dword, \ delta:dword locals n_sec dd ? endl mov eax, [coff] movzx ebx, [eax + COFF_HEADER.nSections] mov [n_sec], ebx lea esi, [eax+20] mov edx, [delta] .fix_sec: mov edi, [esi + COFF_SECTION.PtrReloc] add edi, [coff] movzx ecx, [esi + COFF_SECTION.NumReloc] test ecx, ecx jz .next .reloc_loop: cmp [edi + COFF_RELOC.Type], 6 jne .next_reloc .dir_32: mov eax, [edi + COFF_RELOC.VirtualAddress] add eax, [esi + COFF_SECTION.VirtualAddress] add [eax + edx], edx .next_reloc: add edi, 10 dec ecx jnz .reloc_loop .next: add esi, sizeof.COFF_SECTION dec [n_sec] jnz .fix_sec .exit: ret endp ; in: edx -> COFF_SECTION struct ; out: eax = alignment as mask for bits to drop coff_get_align: ; Rules: ; - if alignment is not given, use default = 4K; ; - if alignment is given and is no more than 4K, use it; ; - if alignment is more than 4K, revert to 4K. push ecx mov cl, byte [edx + COFF_SECTION.Characteristics+2] mov eax, 1 shr cl, 4 dec cl js .default cmp cl, 12 jbe @f .default: mov cl, 12 @@: shl eax, cl pop ecx dec eax ret align 4 proc load_library stdcall, file_name:dword, encoding:dword locals fullname dd ? fileinfo rb 40 coff dd ? img_base dd ? endl ; resolve file name stdcall kernel_alloc, maxPathLength mov [fullname], eax mov edi, eax mov esi, [file_name] mov eax, [encoding] push ebp call getFullPath pop ebp test eax, eax jz .fail ; scan for required DLL in list of already loaded for this process, ; ignore timestamp cli mov esi, [current_process] mov edi, [fullname] mov ebx, [esi + PROC.dlls_list_ptr] test ebx, ebx jz .not_in_process mov esi, [ebx + HDLL.fd] .scan_in_process: cmp esi, ebx jz .not_in_process mov eax, [esi + HDLL.parent] add eax, DLLDESCR.name stdcall strncmp, eax, edi, -1 test eax, eax jnz .next_in_process ; simple variant: load DLL which is already loaded in this process ; just increment reference counters and return address of exports table inc [esi + HDLL.refcount] mov ecx, [esi + HDLL.parent] inc [ecx + DLLDESCR.refcount] mov eax, [ecx + DLLDESCR.exports] sub eax, [ecx + DLLDESCR.defaultbase] add eax, [esi + HDLL.base] sti push eax stdcall kernel_free, [fullname] pop eax ret .next_in_process: mov esi, [esi + HDLL.fd] jmp .scan_in_process .not_in_process: ; scan in full list, compare timestamp sti lea eax, [fileinfo] stdcall get_fileinfo, edi, eax test eax, eax jnz .fail cli mov esi, [dll_list.fd] .scan_for_dlls: cmp esi, dll_list jz .load_new lea eax, [esi + DLLDESCR.name] stdcall strncmp, eax, edi, -1 test eax, eax jnz .continue_scan .test_prev_dll: mov eax, dword [fileinfo+24]; last modified time mov edx, dword [fileinfo+28]; last modified date cmp dword [esi + DLLDESCR.timestamp], eax jnz .continue_scan cmp dword [esi + DLLDESCR.timestamp+4], edx jz .dll_already_loaded .continue_scan: mov esi, [esi + DLLDESCR.fd] jmp .scan_for_dlls ; new DLL .load_new: sti ; load file stdcall load_file, edi test eax, eax jz .fail mov [coff], eax mov dword [fileinfo+32], ebx ; allocate DLLDESCR struct; size is DLLDESCR.sizeof plus size of DLL name mov esi, edi mov ecx, -1 xor eax, eax repnz scasb not ecx lea eax, [ecx + sizeof.DLLDESCR] push ecx call malloc pop ecx test eax, eax jz .fail_and_free_coff ; save timestamp lea edi, [eax + DLLDESCR.name] rep movsb mov esi, eax mov eax, dword [fileinfo+24] mov dword [esi + DLLDESCR.timestamp], eax mov eax, dword [fileinfo+28] mov dword [esi + DLLDESCR.timestamp+4], eax ; calculate size of loaded DLL mov edx, [coff] movzx ecx, [edx + COFF_HEADER.nSections] xor ebx, ebx add edx, sizeof.COFF_HEADER @@: call coff_get_align add ebx, eax not eax and ebx, eax add ebx, [edx + COFF_SECTION.SizeOfRawData] add edx, sizeof.COFF_SECTION dec ecx jnz @B ; it must be nonzero and not too big mov [esi + DLLDESCR.size], ebx test ebx, ebx jz .fail_and_free_dll cmp ebx, MAX_DEFAULT_DLL_ADDR-MIN_DEFAULT_DLL_ADDR ja .fail_and_free_dll ; allocate memory for kernel-side image stdcall kernel_alloc, ebx test eax, eax jz .fail_and_free_dll mov [esi + DLLDESCR.data], eax ; calculate preferred base address add ebx, 0x1FFF and ebx, not 0xFFF mov ecx, [dll_cur_addr] lea edx, [ecx + ebx] cmp edx, MAX_DEFAULT_DLL_ADDR jb @f mov ecx, MIN_DEFAULT_DLL_ADDR lea edx, [ecx + ebx] @@: mov [esi + DLLDESCR.defaultbase], ecx mov [dll_cur_addr], edx ; copy sections and set correct values for VirtualAddress'es in headers push esi mov edx, [coff] movzx ebx, [edx + COFF_HEADER.nSections] mov edi, eax add edx, 20 cld @@: call coff_get_align add ecx, eax add edi, eax not eax and ecx, eax and edi, eax mov [edx + COFF_SECTION.VirtualAddress], ecx add ecx, [edx + COFF_SECTION.SizeOfRawData] mov esi, [edx + COFF_SECTION.PtrRawData] push ecx mov ecx, [edx + COFF_SECTION.SizeOfRawData] test esi, esi jnz .copy xor eax, eax rep stosb jmp .next .copy: add esi, [coff] rep movsb .next: pop ecx add edx, sizeof.COFF_SECTION dec ebx jnz @B pop esi ; save some additional data from COFF file ; later we will use COFF header, headers for sections and symbol table ; and also relocations table for all sections mov edx, [coff] mov ebx, [edx + COFF_HEADER.pSymTable] mov edi, dword [fileinfo+32] sub edi, ebx jc .fail_and_free_data mov [esi + DLLDESCR.symbols_lim], edi add ebx, edx movzx ecx, [edx + COFF_HEADER.nSections] lea ecx, [ecx*5] lea edi, [edi + ecx*8+20] add edx, sizeof.COFF_HEADER @@: movzx eax, [edx + COFF_SECTION.NumReloc] lea eax, [eax*5] lea edi, [edi + eax*2] add edx, sizeof.COFF_SECTION sub ecx, 5 jnz @b stdcall kernel_alloc, edi test eax, eax jz .fail_and_free_data mov edx, [coff] movzx ecx, [edx + COFF_HEADER.nSections] lea ecx, [ecx*5] lea ecx, [ecx*2+5] mov [esi + DLLDESCR.coff_hdr], eax push esi mov esi, edx mov edi, eax rep movsd pop esi mov [esi + DLLDESCR.symbols_ptr], edi push esi mov ecx, [edx+COFF_HEADER.nSymbols] mov [esi + DLLDESCR.symbols_num], ecx mov ecx, [esi + DLLDESCR.symbols_lim] mov esi, ebx rep movsb pop esi mov ebx, [esi + DLLDESCR.coff_hdr] push esi movzx eax, [edx + COFF_HEADER.nSections] lea edx, [ebx+20] @@: movzx ecx, [edx + COFF_SECTION.NumReloc] lea ecx, [ecx*5] mov esi, [edx + COFF_SECTION.PtrReloc] mov [edx + COFF_SECTION.PtrReloc], edi sub [edx + COFF_SECTION.PtrReloc], ebx add esi, [coff] shr ecx, 1 rep movsd adc ecx, ecx rep movsw add edx, sizeof.COFF_SECTION dec eax jnz @b pop esi ; fixup symbols mov edx, ebx mov eax, [ebx + COFF_HEADER.nSymbols] add edx, sizeof.COFF_HEADER mov ecx, [esi + DLLDESCR.symbols_num] lea ecx, [ecx*9] add ecx, ecx add ecx, [esi + DLLDESCR.symbols_ptr] stdcall fix_coff_symbols, edx, [esi + DLLDESCR.symbols_ptr], eax, \ ecx, 0 ; test eax, eax ; jnz @F ; ;@@: stdcall get_coff_sym, [esi + DLLDESCR.symbols_ptr], [ebx + COFF_HEADER.nSymbols], szEXPORTS test eax, eax jnz @F stdcall get_coff_sym, [esi + DLLDESCR.symbols_ptr], [ebx + COFF_HEADER.nSymbols], sz_EXPORTS @@: mov [esi + DLLDESCR.exports], eax ; fix relocs in the hidden copy in kernel memory to default address ; it is first fix; usually this will be enough, but second fix ; can be necessary if real load address will not equal assumption mov eax, [esi + DLLDESCR.data] sub eax, [esi + DLLDESCR.defaultbase] stdcall fix_coff_relocs, ebx, [esi + DLLDESCR.symbols_ptr], eax stdcall kernel_free, [coff] cli ; initialize DLLDESCR struct and dword [esi + DLLDESCR.refcount], 0; no HDLLs yet; later it will be incremented mov [esi + DLLDESCR.fd], dll_list mov eax, [dll_list.bk] mov [dll_list.bk], esi mov [esi + DLLDESCR.bk], eax mov [eax + DLLDESCR.fd], esi .dll_already_loaded: stdcall kernel_free, [fullname] inc [esi + DLLDESCR.refcount] push esi call init_heap pop esi mov edi, [esi + DLLDESCR.size] stdcall user_alloc_at, [esi + DLLDESCR.defaultbase], edi test eax, eax jnz @f stdcall user_alloc, edi test eax, eax jz .fail_and_dereference @@: mov [img_base], eax mov eax, sizeof.HDLL call malloc test eax, eax jz .fail_and_free_user mov ebx, [current_slot] mov edx, [ebx + APPDATA.tid] mov [eax + HDLL.pid], edx push eax call init_dlls_in_thread pop ebx test eax, eax jz .fail_and_free_user mov edx, [eax + HDLL.fd] mov [ebx + HDLL.fd], edx mov [ebx + HDLL.bk], eax mov [eax + HDLL.fd], ebx mov [edx + HDLL.bk], ebx mov eax, ebx mov ebx, [img_base] mov [eax + HDLL.base], ebx mov [eax + HDLL.size], edi mov [eax + HDLL.refcount], 1 mov [eax + HDLL.parent], esi mov edx, ebx shr edx, 12 or dword [page_tabs + (edx-1)*4], MEM_BLOCK_DONT_FREE ; copy entries of page table from kernel-side image to usermode ; use copy-on-write for user-mode image, so map as readonly xor edi, edi mov ecx, [esi + DLLDESCR.data] shr ecx, 12 .map_pages_loop: mov eax, [page_tabs + ecx*4] and eax, -PAGE_SIZE or al, PG_UR xchg eax, [page_tabs + edx*4] test al, 1 jz @f call free_page @@: invlpg [ebx+edi] inc ecx inc edx add edi, PAGE_SIZE cmp edi, [esi + DLLDESCR.size] jb .map_pages_loop ; if real user-mode base is not equal to preferred base, relocate image sub ebx, [esi + DLLDESCR.defaultbase] jz @f stdcall rebase_coff, [esi + DLLDESCR.coff_hdr], [esi + DLLDESCR.symbols_ptr], ebx @@: mov eax, [esi + DLLDESCR.exports] sub eax, [esi + DLLDESCR.defaultbase] add eax, [img_base] sti ret .fail_and_free_data: stdcall kernel_free, [esi + DLLDESCR.data] .fail_and_free_dll: mov eax, esi call free .fail_and_free_coff: stdcall kernel_free, [coff] .fail: stdcall kernel_free, [fullname] xor eax, eax ret .fail_and_free_user: stdcall user_free, [img_base] .fail_and_dereference: mov eax, 1 ; delete 1 reference call dereference_dll sti xor eax, eax ret endp ; initialize [APPDATA.dlls_list_ptr] for given thread ; DLL is per-process object, so APPDATA.dlls_list_ptr must be ; kept in sync for all threads of one process. ; out: eax = APPDATA.dlls_list_ptr if all is OK, ; NULL if memory allocation failed init_dlls_in_thread: mov ebx, [current_process] mov eax, [ebx + PROC.dlls_list_ptr] test eax, eax jnz .ret mov eax, 8 call malloc ; FIXME test eax, eax jz .ret mov [eax], eax mov [eax+4], eax mov ebx, [current_process] mov [ebx + PROC.dlls_list_ptr], eax .ret: ret ; in: eax = number of references to delete, esi -> DLLDESCR struc dereference_dll: sub [esi + DLLDESCR.refcount], eax jnz .ret mov eax, [esi + DLLDESCR.fd] mov edx, [esi + DLLDESCR.bk] mov [eax + DLLDESCR.bk], edx mov [edx + DLLDESCR.fd], eax stdcall kernel_free, [esi + DLLDESCR.coff_hdr] stdcall kernel_free, [esi + DLLDESCR.data] mov eax, esi call free .ret: ret destroy_hdll: push ebx ecx esi edi mov ebx, [eax + HDLL.base] mov esi, [eax + HDLL.parent] mov edx, [esi + DLLDESCR.size] push eax mov esi, [eax + HDLL.parent] mov eax, [eax + HDLL.refcount] call dereference_dll pop eax mov edx, [eax + HDLL.bk] mov ebx, [eax + HDLL.fd] mov [ebx + HDLL.bk], edx mov [edx + HDLL.fd], ebx call free pop edi esi ecx ebx ret ; ecx -> APPDATA for slot, esi = dlls_list_ptr destroy_all_hdlls: test esi, esi jz .ret .loop: mov eax, [esi + HDLL.fd] cmp eax, esi jz free call destroy_hdll jmp .loop .ret: ret ; param ; eax= size ; ebx= pid align 4 create_kernel_object: push ebx call malloc pop ebx test eax, eax jz .fail mov ecx, [current_slot] add ecx, APP_OBJ_OFFSET pushfd cli mov edx, [ecx + APPOBJ.fd] mov [eax + APPOBJ.fd], edx mov [eax + APPOBJ.bk], ecx mov [eax + APPOBJ.pid], ebx mov [ecx + APPOBJ.fd], eax mov [edx + APPOBJ.bk], eax popfd .fail: ret ; param ; eax= object align 4 destroy_kernel_object: pushfd cli mov ebx, [eax + APPOBJ.fd] mov ecx, [eax + APPOBJ.bk] mov [ebx + APPOBJ.bk], ecx mov [ecx + APPOBJ.fd], ebx popfd xor edx, edx ;clear common header mov [eax], edx mov [eax+4], edx mov [eax+8], edx mov [eax+12], edx mov [eax+16], edx call free ;release object memory ret ;void* __fastcall create_object(size_t size) ; param ; ecx= size align 4 create_object: push esi push edi pushfd cli mov esi, [current_process] mov eax, [esi + PROC.ht_free] mov edi, [esi + PROC.ht_next] dec eax js .err0 mov [esi + PROC.ht_free], eax mov eax, [esi + PROC.htab + edi*4] mov [esi + PROC.ht_next], eax popfd mov eax, ecx call malloc test eax, eax jz .err1 mov [eax + FUTEX.handle], edi mov [esi + PROC.htab+edi*4], eax pop edi pop esi ret .err1: pushfd cli mov eax, [esi + PROC.ht_next] mov [esi + PROC.htab+edi*4], eax mov [esi + PROC.ht_next], edi inc [esi + PROC.ht_free] .err0: popfd pop edi pop esi xor eax, eax ret ;int __fastcall destroy_object(struct object *obj) align 4 destroy_object: push esi mov esi, [current_process] mov edx, [ecx + FUTEX.handle] pushfd cli mov eax, [esi + PROC.ht_next] mov [esi + PROC.htab + edx*4], eax mov [esi + PROC.ht_next], edx inc [esi + PROC.ht_free] popfd pop esi mov eax, ecx call free xor eax, eax ret .fail: popfd pop esi mov eax, -1 ret